docs: def get_homology_models(self):
          """DictList: Return a DictList of all homology models in self.structures"""
          # TODO: change to a property?
          if self.representative_structure:
              return DictList(x for x in self.structures if not x.is_experimental and x.id != self.representative_structure.id)
          else:
              return DictList(x for x in self.structures if not x.is_experimental)